Air-cooled rotary internal combustion motor



June 6,1933. J GRAY 1,912,634

AIR COOLED ROTARY INTERNAL COMBUSTION MOTOR j A TTOY.

June 6, 1933. 1 GRAY 1,912,634

AIR COOLED ROTARY INTERNAL COMBUSTION MOTOR Filed May '5, '19.30 8 Sheets-Sheet 2 9;?, Iman/coz v June 6,v 1933.

J. L. GRAY AIR COOLED ROTARY. INTERNAL COMBUSTION MOTOR Filed May 5, 1930 8 Sheets-Sheet 3 J. l.. GRAY 1,912,634

AIR COOLED ROTARY INTERNAL COMBUSTION MOTOR Filed May 3, 195o Ssheets-sneet 4 June 6, 1933.

'June 6, 1933. J. L. GRAY AIR cooLED ROTARY INTERNAL coMBUsTloN MoToR Filed May 5, 1930 8 Sheets-Sheet 5 J. L. GRAY 1,912,634

AIR COOLED ROTARY NTERNAL COMBUSTION MOTOR,

June 6, 1933.

Filed May 3, 1930 8 Sheets-Sheet' 6 v S11/vanto@ Jeff@ L Gray June 6, 1933. J. L.. GRAY 1,912,634

AIR COLED ROTARY INTERNAL COMBUSTION MOTOR Filed may s, 1930 8 sheets-sheet 7 June 6, 1933. J. L. GRAY AIR COOLED ROTARY INTERNAL COMBUSTION MOTOR Filed May 5, 1930 8 Sheet`s-Sheet 8 f ff Patented JuewG, 1933 t t Jnssn or nanas, rnxAs l i f mecdotaplamiiax inneemt,cenmrsnenjmomba t fappiicatin ined Meern 3, 1930. serian No.` 449,414.V

` "Thisinvention relates to new and `useful "W further object Tvof itheinvention isto provide an improved motor t, of the `character describedfinvolving a new and novelytooth i arrangement, whereby the-:most efficient operation `asian, teethef with Certain im* provementszin the `air and fuelinlets.

1, Anotherobjectfof the invention is to re-V duce the heat radiating surface, in andraround rthe combustioncha1nbers,as well as to reduce [the Weightof the niotorlw` *620 A still further ob'ectof the invention 1s 1 to eliminatie-,inamotor a greater `number Vof u wearing j parts, suchwasgears, "connecting rods, pistons valves, {resilien't packings and` the bearing surfaces ofi these parts. i.

i i `Afurtlier objectofthe invention iste provide an improvedrotary induction` for the fuel `intakefwherebylthefuel consumed isfin t proportion `tothe R. PuM. of the motor, .thus ,making for proportional horsepower-w t' 39 :Anotherobjectof `theinv'eltitnristo ,pro-` vide ahigh speed motorzthrough 'the -elimination of all reciprocatingparts,land means whereby the ratio `of horsepower` to `"weight isincreased with thef increased R. P. M. of theinotor.may f i .u L

Y-A stillfurther= object f-ofthe invention is t to providef an improvedmotor of the character described made on the twofstroke` cycle `principle A, wherebyy `the hrsepower `f `is w ingeocreased. 'i f fStillxanotherobject of the; invention 'iis toprovide an automatic ignition system and centrifugal air filterlngV meansl 1n"` combination `with an improved forced air cooling M5 system,` aswell] as certainother L advantages tobe` hereinafterpointedfout;` w; Y, Alt construction designed `to carry out the invent-ion? will bek hereinafter described `t0- i gather Lwith otherufeatures jof the1 invention.

1,540 Theinventiongwill-be morereadily underi Figure 3 is auview stood from a reading ofthe following specif cation and by referenceyto-the accompanying drawings inwhich `anexample ofthe invention is shown, and wherein:` i v Figure l is a side Aelevation of a motor 545, constructed inaccordance with the invenan lend elevation "ofl saine, partly in .elevation and Figure 2 partlyin section, t i i ,i t- 60 Figure tis antenlarged ,verticalV sectional view taken online ttof Figure 2,` i

Figures 5 ando are perspective views of the internal combustion rings showing a portion of the teeth insection, f v` i i 6 Figures 7 `and :are enlarged transverse sectional views ofthe combustion ring teeth showing alternate forms of `air `channels therein, t i i, Figure `9 isa sectional view taken on line 70 9+-9ofFigure 8, M, Y

F igurel isa cross-sectionalviewtaken Online10=+10ofFigure7f 1" 1 1' :f Figure. 11 is1a cross-sectionalviewtaken on line 11-4-11 of Figure 8,1 1 L 75 i F igure12 is a* cross-sectional view taken on line 12--12 of Figureip` ,t @Figure 13 isavimv partly in sectionand partly in elevation of the globular revolving head, i Figurezll is'an `endelevatien of the same, Figure: 15 is a view partlyin section and partlyin elevation of acombustionfchamber Casing,H 1' ff? Figure `16 isa diagrammatical assembly of the revolving head and the combustion rings ass'een from thebottomf Y t i 'i 4 f i Figure 17 is a plan view of the combustion rings and revolving head assenvihly,V t t l is at bottom view" ofthe f' 1 t Figure `19 la diagrammaticalfviewfshowing the relation ,ofV the clearances of the coin-` bustion rings and therevolvingfhead, t t i Figure 2O is a rear view of thefelnale com`- bustionring; j 2 l t Y r i Figure 21 is asectional view taken Online 21-21ofFigure20, i i e `Figure 22is aperspectifve' view of one of the teeth ofthefemalecombustion ring; 109

Figure 23 is a transverse sectional view taken on line 234-23 of Figure 3,

Figure 24 is a view partly in section and partly in elevation of the horn shaped induction duct,

Fig. 25 is a sectional view showing an alternate form of mounting the apexed combustion ring to the revolving head, and

Figure 26 is a View partly in section and partly in elevation of the lubricating means.

In the drawings the numeral' 20 designates a split gear case which is preferably given a frusto-conical shape so as to offer less wind resistance. Y Y

4The gear case has a pinion housing 21 depending fromV its lower rear portion. The gear case and pinion housing are preferably made integral with a mounting plate 22 which is suitably supportedl as by tubing struts 23. A bearing 24 is confined in anV annular housing 25 mounted inthe front end of the gear case 2O and a bearing 26 is confined in an annular housing 27 -mounted in the rear end of the casing 20.3' A hollow shaft 28 is.

mounted in the bearings 24 and 26 and is provided with a kbearing sleeve 29 which has its Y rear end screw threaded onlthe shaft and its front 'end forming a part of the bearing 24. The shaft extends forwardly from the gear case for receiving a propeller or other element which it is desired to drive and which is not shown. A gear 30 is securely mounted'.

on the :shaft and positioned centrally of the pinion housing for meshing with a pinion 31 rotatably mounted upon a tubular mandrel 32. The pinion is provided with bearings 33 and 34 confinedA bybearing housings 33 and 34 of the pinion and annular nuts 35 and 36 screw threaded intothe housings 33 secured to the plate 22 and Vconnects the mandrel with'a carburetor` 39. A fuel supply line 40 leads to the carburetor from a suitable supply source notshown. The carburetor v has a throttle valve 41.

The pinion 31 is provided with an annular flange 42 having radial lugs 42 enga-ged in notches 43 in anv annular collar 43 of a thrust bearing housing 44. l The'pinion is confined on the mandrel between the housing 44 and a shoulder45 of the mandrel. The housing 44 confines a thrust bearing 46 which is secured therein by an annular nut 47. The bearing 46 bears against a shoulder 48 of the mandrel against which it is confined by a thrust sleeve 49 secured intermediate the housing 44 and a piston member or a male combustion ring 50.` The sleeve 49 is secured to the back of the ring 50 within an annularmanifold 53 and divides this manifold into an inner chamber B and an outer chamber C. This sleeve is of frusto-conical shape and is provided about its circumference with a plurality of blades 51 turned so as to force air within the sleeve as the motor revolves (best shown inl Fig. 23).

An annular flange 52' is mounted within the sleeve for dellecting to outlet ports 53 foreign particles such as sand and dirt that may be in' the air whereby these foreign particles will beexpelled through the openings by centrifugal force.

The male combustion ring 50 is provided with a plurality of pointed or apexed teeth 54 having seats 55 ltherebetween each tooth constituting a piston.` As is shown in Figures 3 and 5, the teeth 54 are hollow cooling chambers andare provided on opposite sides with aplurality of internal 4heatradiating fins 50. f l y .In Figures 7, 8,9 and 10 I show two arrangements ofbaffles 54 and v55 either of which may be used inconnection with the finsv 50* for increasingthe velocity of air between said fins. If desired, the baffles and fins may be left entirely out of the hollow portions of the teeth. The hollow portions of these teeth connectwvith the annular'manifol( 53. rlhe ringl is secured by pins 56 to -a globular revolving vhead 57 in a lvertical position. Y

. A connecting sleeve 58 is secured between the head 57 and the bearing'housing 44'. This sleeve, together withfjthe thrust. sleeve 49 forms a channel for the passage of air from `the bladesf51 to the manifold chamber By from which the air is dischargedinto the hollow portions of the teeth 54.l vThe air is discharged from the chamber C mainly by the centrifugal force imparted tothe air when passingthrough the cooling chambers in the hollow teeth-54gwhich act thereon as centrifugal fan blades; such force being slightly augmented bytheblades 51.1` InV this manner a circulation of airis located within- .the hol- -low portions of the teeth..A

The sleeve 58 eneircles' discharge ports 59 yof ythe mandrel Vand serves to conduct Vthe fuel gases to an annular. manifold chamber 60 encirclingther'mandrel. and within the head 57. Manifold ports 61 lspaced radially ofa web 62 inf the head 57 4connectthemanifoldfchamber 60 with inlet ports 63 whereby fuel may pass from the manifoldfchamber yto the' inlet ports.l The number of'ports 63 corresponds to thenumber of seats V55 ofthe-ring -504 opposite which the ports are positioned.

Thev web is provided Awith an annular groove 64 having shoulders 65-,one of which is screw' threaded for receiving 'an annular nut 66.'- l.flfsleeve -67 telescopes into 'the op` posite shoulder 65 and forms a circular chan' nell between the shoulder and an internal an fie "nularlilange' "l ofthe headfor connecting g the ports63.V Bearingsr68'arelconfined betweenthe sleeve 67 andthe nut66. Anannular corrugated spring 69 is Vconfined in the groove 64 by thebearing 68. l This spring servesfasa cushion forthehead^f57whereby as the head revolves"` it will find `its true `vertical aXfis dueL to centrifugal force. n

j *LA chamber member` or a `feinale combustion ring 7l is `mounted on the` head `57 with its axis at an acuteiangle to theaxis of the ring Vand* with its teeth `72 intermeshing Withthe teeth 54 of the combustion ring 5() at thelovverside `of themotor. (Figs. 3,"4 and `1118) The ring =71 has chambers or valleys n 73provided `between its teeth 7 Zand in which the teeth54 of theiringOengage. The teeth of this combustion ring are hollow to form coolingrecessesasarethose ofthe ring 50 andareprovided with cooling fins 74. Each `tooth u72isy provided in one `corner with a` replaceahleiT shaped'wear key 72 `(best "fee ` shown in Figures l2 and 22.) n The ring 7lis alsoj provided withan annularfmanifold 7 5 connecting with the hollow portions ofthe "teeth 72.11 A

HIt will .i be

the ring `5 0 (Fig. 5), have-a long `tooth addendum` above `the pitch circle F fand a very short tooth base below said pitch circle;` while "the teethlz72of the ringi7l have conversely a very short toothaddendum above 'the pitch circle GfFi r. 6;)and a long tooth base or root below saidpitclr circle. The long tooth addendum. of the teeth 54 givesthe teethof both rings` a long rsliding contact` from the pitchcircleFtovthe tooth apex. This length of sliding` contact is the `length of effective piston travel. "Inyfthe' structure illustrated,

`the ring hasone'` tooth 72 more than the `.ring 5,0 has teeth` 54 whereby the ring 50has a slightly higherfrotative speed than the ring v 71and the 'teeth 54 engage inthesucceeding valleys73 at eachrevolution of the rings. i

` n A casing 76 securedtorthefcoinbnstion,,ring 71bypin's77encir`cles thering andghas one end `overhanging l the same,` l plurality` of radial suction flues 78 are .provideldfin the casing between ribs79 (Figurefl). These flues connect with Aports 80 in the overhanging end of the `c`a"sing. A sleeve Sl secured tothev ringat therear ofthe valleys 7 3 and extending to therear of the easing 7 6," divides thej` manifold 75 into @chambers D and E.

The Cherubs/r1? connects the ports sown-haie. n 4hollow portions @of thenteethyz i u.

"A .plurality loflopenings SQare provided fradially'in the sleeve 8l and"oppositejthe ports 89 to prdvidea bypassof the cool air within the chamber-E to the ports SOand flues 7 Theopenings 82f arelarge enough *hollovv portions fof," thee-u` teeth, `whereby the coolby-passed Va-il will mix' with and cool the hot air coming"frornthefchaniber Dif f `observed that the teeth .'54` of A cover 83 is provided on the casing whereL bythe a-ir' in the Hue willbe conducted outwardly to the outer ends of said flue. As the casing revolves the outer ends of the ribs 79 will act as fan blades' forthrowing the airfromthe flues, thereby `increasing the induction within said fines. The casing 76 has areduced annular collar `76 extending rearfwardly therefrom and providedwith a pluralityof radial slots 771.

JA sleeve-84 secured tothe forward end of the casing76foverbangs the teeth 7 2 anda portion ofthe ring 50. The sleeve 84 is provided withl a @plurality `of radiating fins`85 positioned `circuinfere'ntially of the sleeve to formf air channels thereabout as the same re-` volves. `The casing and sleeve, together with the revolving head 57 confine the combustion ring 71 and partially confinethe combustion ring` S0-thereby formingcombustion chambers Awitlii1rtl-ie valleys 73""andV the seats `55 between' each of the packing seals 72". The sleeve `forms a seal `between the combustion ringsr n ,i A thrust sleeve 92, frusto-conical in shape, .is secured at v:one endto the casing 76 and at` itsother endjtoa bearingfhousing 93. This sleeve is providedaboutV its circumference with a plurality of blades 94 similarto the .blades 511 forforcing air Within the sleeve asthe same revolves. The housing 93,to

v`gether with acap 95,confineja.thrust bearing 96 which is positioned on the annular end. of

tlieinandrel bya nut 97 andja lock nut 98.

A connecting sleeve 99 encircling theman- -drel is secured between the .bearing housing 93and the ninerflange 7l ofthe combustion ring 7 1. The sleeve 92, together with a sleeve which the `air is discharged into the hollow g portions of the teeth `72. The air circulates betweenl the ffins 74 and passes into and foreign. particles such assand, dirt and the like which may enterthrough the blade openings, to `theslots 77 through which the oreign. particles areeXpelled `by centrifugal orce.

i As `is best shown in Figs; 3, 16 and 18',fuel

,willi enter" the combustion `chambers A` through the ports63 and will be compressed in said` chambersl as the teeth of ,the rings mesh. -When "the chambersA are in a 4posi- "tion A"(Fig;"18)*with the teeth 54 `fully meshed with the teeth 72,;the fuel chargeslin safidchambersare firedl Theexplosion` of the fuelwill force theringsapart therebycausing "them to revolve `about their axes. The valleys dri `through.the chamber l) to the portsSO and the i fiues 7 8. i .The flange 81" serves to deflect any 1:10

` lation to the ports 68 is such. that when the chambers A are enclosed bythe casing76 and sleeve 84, the fuel ports are also closed.` As the combustion rings revolve, after'the explosion of the fuel has taken place, the chambers A will begin to open, as shown inFig. 17, thus allowing the exhausted gases to be discharged into an exhaust ring 87 having a discharge shank 87. Also, the fuelports 63 will be opened as the exhaust action takes place, thus permitting the fuel gases to enter into the combustion chambers andforce out the exhausted gases. .Due vto high rotative speed of the motor the combustion chambers will be closed before any fuel gases have time to escape under normal operating conditions. The exhaust ring is semifcircular in shape and is positioned over the upper portion of the motor to catch orreceive the exhaust gases. As seen vin Figures 3 and 4 the exhaust gases passing from the combustion chamber will heat up the outer edge of the sleeve 84, but it will be noted that only the inner portion of the sleeve is adjacent the combustion chamber during the compression of the fuel in said chamber andthat trouble resulting from hot spots which cause preigni-tion will be done away with, thereby vassuring the even firing order of lthe successive ,combustion chambers. Y

F or cooling the sleeve 84, ahorn shaped duct `88 positioned .concentric to the Vmotor hasV a flared opening 89 over ythe fan portion of the casing for receiving forced air from the flues 78 and for conducting this air through a nozzle 90 to the sleeve 84; The duct 88 and exhaust ring 87 are supported by braces 91'secure'd to thecasingv20.

As is best shown in Figs. 4 and 21, spark plugs 100 are oppositely mounted within the manifold 75 in the rear yof the valleys 73 with the spark gaps 101 of the/.plugs eX- tending into circular grooves 102 in Vsaid valleys. y

Contact points 103 are oppositely mounted in the thrust sleeve 92 opposite the spark plugs 100, to which `they are connected by 4wire leads 104. A springtensioned brush arm 105 is adjustably Vsecured to and in-V sulated from a supporting arm 106 at theY bottom Vof the lmotor and is positioned to engagewith the contacts 103 at A', the point of firing the fuel charge in the combustion chambers A.. Bv theadjustable mounting of the brush arm 105, the firing position of the chambers Amay be varied thus making for timing of the fuel explosion. The brush arm is connected with a suitable source of electric current such as a connection by a wire lead 107 to one side of a coil 108 which is charged by a battery 109 having electrical connectionsI 1.10 and 111 to said coil. The opposite side of the coil is grounded to the support arm 106 by a wire connection 112; The support arm is mounted on a horn shaped duct 113 supported by the braces 91.

ThisV duct ispositioned concentric to the motor at its lower side and has a'flared opening 114 over the fan portion of the casing 76 for receiving forced air from the flues 78 and for conducting this air to an induction tube 115 which is connected at one end to the duct 113. Y

A plurality of minute openings 116 are provided in the periphery vof the duct for the discharging1 through said openings by centrifugal force, any foreign particles such as sand or dirt which may be in the air. The other end of the tube 115 connects with the intake 117 of the carburetor 39 for supply ing air under pressure to said carburetor. Y As the forced airlcoming from the flues 78 is warm, it will readily miX with the liquid 'fuel in the carburetor thereby forming a highly combustibler gaseous fuel. This gaseous fuel is preheated as it Ipasses through the manifold 60y andthe ports 61 and 63, and is supplied to the chambers A in a readily combustible form.

Itis not believed necessary to go into detail of the lubricating system as practices well known inthe artar'e used. However, I

. have shown a common method of lubricating the motor. As is best shown in Figures 1 and 26, I provide a lubricating container 118 having a sight feed 119 adjustable by a needle point lvalve 120 which is provided with a suitable'knob 121 secured to the valve stem.

lThe container is secured to the case 2O by a bracket 122 and has ay lubricant conductor 123 leading from the sight feed 119 through the elbow 38, and discharging into the mandrel 32. y

AnV air inlet conductor 124 has a T connection 125 Yat one lend with the conductor 123 and is connected at its other end to the top of the container 118 whereby air may enter the discharge end of the conductor V123 and pass upward through the conductor 124 to within the top of the container-118 for displacing the lubricant in said container. The container has a removable plug 126 in its .top to provide for the refilling of the container.

v The needle valve 120 is adjusted to provide for a. suitable dripof oil from the discharge end of the conductor 123 into the path of the fuel gases which pick up the oil and distribute it to the-various-parts of the motor. Y

In operating the engine, suitable fuel such 1 "25, electrical connection to said brush arm may A35, ciple as Willibeexplained byreference to a e mandrelBQ. The fuel passes from the man-` drelthroughthe discharge ports, 59"-to the manifold chambenjO from which Lit in turn passes throughthejmanifold ,ports 6l vand the,`

inlet 5 ports 63. into y, the *combustion i, chami fAsuitable starter` (not shown) 3 maybe connected with the shaft `28 or said shaft may be manually revolved by turning the propeller (not shown) thereon `for revolving themotor to `prime the same.` The spark plugs are used only for firing the compressediuel in the chambers opposite said plugs asthe succeeding chamberswill be fired by the passage l of the; exploding-fuel through the groove 86 from 'the preceding chambers. `After `the explosion in :the first v chamber has f taken place,lthe brush arm 10,5 may bevomoved from contactposition withgthe contacts `103 or the be brokenasl desired by provision of a stitch 107 inthe wire ylead 107.: A

y Itis tobeunderstood thatthe invention is not to be limited tothe use ospark plugsfor starting purposes onlyas spark plugs may be used in place ofthe ignition ducts for the successive `firing ofthe fuel charges in the chambers Aa i fi The engineis operated ona two cycle prinsingle compression chamber A. WVith referencer-touFigure 2,the engine revolves in an anti-,clockwise i direction. :l i As `the v chamberA A 4o passes through the rstzquadrant of its revo-` lution the chamber Aris. openedand the exhaust gases areexpelled by-,thefuel gases as i the inlet port toppositesaid chamber opens simultaneously"therewith. ,i y With the passage e y of the chamber" through its second quadrant,

the Chamberland its inlet portfclose. The discharging-fof? `the exhaust' gases `from the chamber A and the intake of the fuel gases y into said chamberftherefore take place dury ingthe passage. oftbejchamber A through its lirstfandsecondquadrants, or through a semirevolution. i: i i

v, As the chamber 1 passes jthrough its third quadrant,` the ,fuel e charge is `compressed through the meshing actionfof the combustion rings. y, The Tfuelchargeis fired or ,exploded at its highest point ofk compression, thereby causing the fulLfforceof the explosion to eX- pand the chamber-:A.Y` `This;expansion of the f chamber takes-1iplacelduring tits passage "670,

through thev ourthquadrant and as the combustion i rings `disengage. The eompression and eX Y ansion :ofhthe fueltherefore Itakes place uringffthe passageof the chamber through the third and Jfourth` `quadrants i or through; e .Semifrevolutenf "1nthsmanner y efficiency AAing;operation. The elimination of all reciprocating parts and the improved air cooling` andair filtering systems provide for la highspeed motorofincreased desirability, Obviously the simplicity of construction re-` duces the weight of the motor which with the aforementioned features make forv depend-` ability.` V e e e have shoWn-inFigureQ a modified form of mountingithe male combustion `ring 50 on `the carrier head 5i'.V This ring provided with aninternal annular hook 130 which is hooked over a reduced end-i131 `of the head 57, whereby Lthe ringzll;` is braced against radialfdisplacement from said head` AAlso the bill r132 of'the hook extends inwardlyfof` the hea-d beyond a transverse plane coinci-` dentvto the center otgravity of thering `50 so that the center of gravity offsaid ring is transferredto the bill,iwhereby the centrifugal force of the ring is sustained by the head.

`Various, changes inthe size and shape of the different parts, aswell asmodiications *and alterations, may be made within the scope lsurrounding cooling sleeve carried by one of,

the members and into which -the other membertelescopes. i ,i i y V* j" D y `2. A rotary engine as set llforth in claim 1 with'the chamber member having one more chamberV element than the piston member'has piston` elements, whereby `the chamber elements are successively engaged vthereby causing the piston member to revolve at ahigher speed than the chamber jmember.- e l.

v 3. A rotary engineas setpforth in claim 1 with the piston member beingfholjlow and having internal meanslfor dissipating heat. ,4, Ina rotary engine, a revolvingchamber member and Aaj revolving piston member `dis- Alio posed at an angle to each other, whereby the piston elements of one member ride intol and outlofythe chamber elements `of the other y member, the piston members being `hollow and having internal means for radiating-heat, and meansfor circulating airythrough the hollow piston member` to dissipateheat.`

,. `5. A rotary engine asset forth inclaiml vwith thel piston member being hollow and having `heat `radiating `projections within the Y piston elements, cooling chambers connecting withfthe hollowed piston'elements, means Vfor introducing airto vone Vof the cooling chambers, and means for exhausting air fromthe' other cooling chambers.

6. As a subcombination in a rotary engine, al revoluble annular piston member having hollow radial teeth:constitutingl piston elef ments; heat radiating projections Within 'said' 'with the chamber member having cooling recesses between its chamberY elements, means for introducing air to saidrecesses and means for exhausting air from said recesses.

9. In a rotary engine, rotating combustion members having lintermeshing elements for compressing the fuel charge'therebetween, means for circulating air through the intermeshing'elements 'of said members, means for supplyingfuel to said members, vand-means for conducting a portion of said circulated air yto the fuel supply .means and means for discharging the remainder of such-*circulated air to atmosphere.

' 10. The combination set-forth in claim 9 with a heat radiating sleeve carried by one of Athe combustion members, and means for directing air onto said'sleeve for cooling the radiating sleeve.

ll. As a subcombination in a rotary engine, a combustion ring having radial combustion vchambers and cooling recesses between said chambers, spark plugs mounted' in the chambers, and heat radiating elements within the cooling recesses. e 12. As a subeombination in a rotaryengine, a heat dissipating ring for surroundingv the combustion members, means for conducting air from the combustion members', and dischargingit 'upon the ring at the exhaust point'of the combustion members.

13. In al rotary engine, acentralsupport, a carrier surrounding the support land rotatable thereon, Ysaid carrier having fuel supply ports, a male vcombustion member` carriedv by the carrier and rotatable therewith, a female combustion member rotatable on the carrier 'and having "combustion chambers intermittently eXposingthe ports ofthe carrier, and means forlsupplying fuel tothe carrier. 14. In a rotary engine,a tubularmandrel, a carrier surrounding the mandrel and rotatable thereon, said carrier having fuel supply ports, a'male combustion member carried by the carrier and rotatabletherewith, a female combustion-memberrotatable on the carrier and Vhaving combustion chambers intermittently exposing thel ports ofthe carrier, and means for supplying vfuel tothe carrier. Y

155A rotary engine as set forth in claim l with-the chamber member having Vchambers and cooling recesses between its chambers, means fory providing fa circulation of air, means for filtering the air, means for'introducing the air' intothe' cooling recesses, and means foreXhausting the air from said coc-ling recesses.A Y f 6. As a subcombination in a` rotaryen# gine, a combustion ring 'having coolingrecesses, radial flues connecting with the recesses and discharging air therefrom', an in take manifold partially surrounding the flues and receiving the discharged air, means within themanifold for filtering the air, and a carburetor withlwhich-the manifold is connected for'supplying air thereto. 17. In a rotary engine, a vrotatable carrier, a male combustion member mounted on the carrier and rotatable therewith, and a female combustion member meshing with the male member and -mounted to rotate on the carrier and co-aeting with the male member, the carf rier and fthemembers having complementary arcuatefaces i-n contact, whereby a Huid-tight connection is maintained therebetween. y "18. In a.-rotary engine,a rotatable 'carrier having apartially sphericalsurface, a combustion member surrounding said carrier and immovably mounted on the surface thereof, 'and a second combustion member mounted to rotate around said carrier and to oscillate thereon and co-acting -withthehrst member. 19. In a frotary-engineya rotatable carrier, a maleY combustion member mounted on the carrier and rotatable therewith,'and a female combustion member rotatable on the carrier and co-acting with the .malememben the carrier Land the members having complementary arcuate faces in contact, whereby a fluid-tight connectionv is maintained therebetween, the said membershaving partially spherical Vouter surfaces, a casing `fitting on the' female member, an "exhaust ring carriediby' the Vfemale member 'and havinga partially `sphericalbore complementary tothe outer surface' of ithe male memberforI receiving the' latter and forming therewith a iiuid-tightfworking contact; 20. In a rotary engine', a pair of intermeshing rotatable combustion members, 'oneof said members Yhaving -air fcooled1ehambe1s segregated from its combustion chambers, means for forcing air into fthe' chambers of the'l member, means for bypassing a portion ofthe air, and means'for carrying off thev air from the 'chambers of the members and the by-passedair in common. L 21.' An engine as set forth in claim 20 anda cooling sleeve surrounding the members, and means for discharging theair from the'commonl carrying fmeans onto thel 'cooling sleeve. Y 22. An engine as set Y'forth in claim 20 and. van exhaust ring communicating ywith the combustion chambers ofthe members: 23` In y'a rotary engine, a rotatable carrier having fuellports, meansy forintro'ducing fuel into said carrier, a piston member surrounding and fast upon the carrier, a cylinder combustion member surrounding and rotatable upon the carriera the cylinder member having recesses registering With Jshe ports of the cari rier and receiving the Vpistons of Jche other member, the carrier having flash ductsyand meansor cooling the members.

" 24. An engine as set forth in claim 23 and av p cooling sleeve surrounding the members.

25. An engine as set forth in claim 23 with 1the cylinder member provided With cooling chambers, connected With the cooling means,l

` fines connected with the chambers, meansfor Y p filtering Jshe Vair discharged from the lues, a

cooling sleeve surrounding the members, and

means for discharging the air from the fiues onto the sleeve.

go In testimony whereof I aiiix my signature.

`J ESSE L. GRAY. 

